For those who shoot with a DSLR and need light without excess
equipment to worry about, the Rotolight, an attachment with 48
LED lights on a disc, just might be the answer.  The 48 LED lights
provide 50 watts of light that doesn’t cause shadows and switches
between three color temperatures.  For convenience the Rotolight
connects to your DSLR camera via the hotshoe or mic and has a stow
for its included filters. Available on Amazon.com.